import axios from 'axios';
import config from './config';
import Cookies from "js-cookie";
import router from '@/router'

// 使用vuex做全局loading时使用
// import store from '@/store'

export default function $axios(options) {
  return new Promise((resolve, reject) => {
    
    const instance = axios.create({
      baseURL: config.baseUrl,
      headers: config.headers,
      timeout: config.timeout,
      withCredentials: config.withCredentials
    })

    // request 拦截器
    instance.interceptors.request.use(
              config => {
                let token = Cookies.get('token')
                if (token) {
                  config.headers.token = token
                } else {
                  // 重定向到登录页面
                  router.push('/login')
                } 
                return config
              },

              error => {
                console.log('request:', error) 
                if (error.code === 'ECONNABORTED' && error.message.indexOf('timeout') !== -1) {
                  console.log('timeout请求超时') 
                } 
                const errorInfo = error.response
                console.log(errorInfo)
                if (errorInfo) {
                  error = errorInfo.data  // 页面那边catch的时候就能拿到详细的错误信息,看最下边的Promise.reject
                  const errorStatus = errorInfo.status; // 404 403 500 ...
                  router.push({
                    path: `/${errorStatus}`
                  })
                }
                return Promise.reject(error) // 在调用的那边可以拿到(catch)你想返回的错误信息
              }
    )

    // response 拦截器
    instance.interceptors.response.use(
                response => {
                  let data; 
                  // IE9时response.data是undefined，因此需要使用response.request.responseText(Stringify后的字符串)
                  if (response.data == undefined) {
                    data = JSON.parse(response.request.responseText)
                  } else {
                    data = response.data
                  }
                  if(data.code==20000){
                    Cookies.remove("token")
                    router.push("/login")
                  }
                  // 根据返回的code值来做不同的处理
                  switch (data.rc) {
                    case 1:
                      console.log(data.desc)
                      break;
                    case 0:
                      store.commit('changeState')
                      // console.log('登录成功')
                    default:
                  } 
                  return data
                },
                err => { 
                  if (err && err.response) { 
                    switch (err.response.status) {
                      case 400:
                        err.message = '请求错误'
                        break
                      case 401:
                        err.message = '未授权，请登录'
                        break
                      case 403:
                        err.message = '拒绝访问'
                        break
                      case 404:
                        err.message = `请求地址出错: ${err.response.config.url}`
                        break
                      case 408:
                        err.message = '请求超时'
                        break
                      case 500:
                        err.message = '服务器内部错误'
                        break
                      case 501:
                        err.message = '服务未实现'
                        break
                      case 502:
                        err.message = '网关错误'
                        break
                      case 503:
                        err.message = '服务不可用'
                        break
                      case 504:
                        err.message = '网关超时'
                        break
                      case 505:
                        err.message = 'HTTP版本不受支持'
                        break
                      default:
                    }
                  }
                  console.error(err)
                  return Promise.reject(err) // 返回接口返回的错误信息
                }
    )

    // 请求处理
    instance(options).then(res => {
      resolve(res)
      return false
    }).catch(error => {
      reject(error)
    })
  })
}